Have I messed everything up? Can it be fixed?

I hate this system. It seems to have a mind of its own and is NOT user friendly. And again, this morning, my computer took over. I was trying to select a group of images to be uploaded from a DVD to website. I kind of know how to highlight the images I want, but half the time they just get moved. This time it looks like I have moved them OFF the DVD to be copied to a different disk. The image numbers are under a file that says "Images to be copied to disk" and no longer exist in the list of images on the original disk. Did I remove this images from the disk? If so, how do I undo this action? Right now a number of my wedding photos seem to be in limbo. All I want to do is select a group of images from the disk and upload them to a site so I can get them processed!